log_buffer Value setting NOT effective ?

Folks

Even though log_buffer is set to 1M, on Database Startup it is automatically getting reset to 14MB (shown below) NOTE - sga_target=0
NOTE - Online Redo logfile size = 1 GB

Oracle 10.2.0.3
HP-UX 11.31

Any ideas why?

Cheers & Thanks

Vivek

P.S.

SQL> startup
ORACLE instance started.

Total System Global Area 3254779904 bytes

Fixed Size                  2048904 bytes
Variable Size            1090522232 bytes
Database Buffers         2147483648 bytes
Redo Buffers               14725120 bytes

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